OpenWeatherMap posting measurements returns "204 No Content"-CodePudding

I am trying to use the new OpenWeatherMap Stations API to post measurements from my local weatherstation to the OWM DB. I will be using a Raspberry Pi server for this, but for now I want to test out the api. I am using Postman to do some requests. I have already created a valid station with my api key.
A few weeks back I posted one measurement to it, and I can see that measurement was saved when I do a GET request on this station id. I saved the request in Postman and tried the same request (adjusted the date) but the api returns "204 No Content".
This is the curl request I am sending (used the example from the api docs):

curl --location --request POST 'http://api.openweathermap.org/data/3.0/measurements?appid=<my_api_key>' \
--header 'Content-Type: application/json' \
--data-raw '[
  {
    "station_id": "<my_station_id>",
    "dt": 1631613233,
    "temperature": 20.0,
    "wind_speed": 1.2,
    "wind_gust": 3.4,
    "pressure": 1021,
    "humidity": 87,
    "rain_1h": 2,
    "clouds": [
      {
          "condition": "NSC"
      }
    ]
  }
]'

And this is the answer I am getting from the API (the body is empty):

{
  'Server': 'openresty',
  'Date': 'Tue, 14 Sep 2021 09:53:54 GMT',
  'Connection': 'keep-alive',
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Credentials': 'true',
  'Access-Control-Allow-Methods': 'GET, POST'
}

Has somebody encountered this before, or am I missing something obvious? Thanks in advance.

EDIT: As I was looking today (on the next day after I posted this), my measurements where saved. Apperently it takes a few minutes (or hours?) for the api to update. If anyone knows why that might be, please let me know.

CodePudding user response：

Their docs says that

In case of successful measurements dispatch method returns an HTTP code 204.

It means your request was successful, now you can GET info.